Canadians use an average of 75L of hot water each at home every day, for washing dishes and clothing, cleaning and personal hygiene. Water heaters account for 17 percent of the energy consumed in the average Canadian home. That share can vary from 15 to 25 percent depending on the house type, number of inhabitants and their lifestyle habits.We have 3 different hot water tank:1- Direct vent hot water tank 2- Power vent hot water tank : Most recommended high efficiency3- Hot water tankless (instantaneous ): space saver , high efficiency